Godot 4.6.1 How to use the new theme in a project?

Godot 4.6.1 looks great.

As a result I thought I’d try the new theme with a project and couldn’t get it to work.

I created a new theme and set it in the project settings.

After setting the theme I saved and reloaded the project. However while the theme editor preview shows controls as having the new minimalist theme applied, the viewport displays the old controls with the old theme, the same happens when the project is run.

As can be seen in the above screenshot the theme is not applied to a single control. How do I use this new theme in a project?

In your Scene Tree select the Control (green) node highest in the hierarch, and in the Inspector load your Theme under Control → Theme → Theme.

I just tried your suggestion and it has no effect.

Even applying the theme to a single control like a button on the control has no effect.

Are you saving the theme to disk?